Hercules and Xena's World Gods:
The Olympians
We have seen what they are capable of:
Zeus:
He was able to absorb into himself the ebsence of his wife Hera, that was nearly powerful as him.He has show to been able to transform into a God his son Hercules just with a wave of his hand.He has also shown amazing strenght and stamina, fly, teleportation, and energy manipulation powers, like when he's shooting lightnings or like when he parry the best shots of his son that was trying to save Xena's daughter from him using a force field on his hand, repelling Hercules attacks.
And he knock down him with ease.
Hera
Second most powerful god of the Olympus, when she becomes ruler of Olympus, she give Hercules in god form a run for his money and nearly kills him, she was able to fly, teleportation, and energy manipulation powers like when she shoot energy blasts or fireballs.She was able to create beings sufficiently powerful to stay fist to fist with Hercules like those two women, one composed of water, the other one of fire.
Ares(We'll miss you Kevin Smith)
He was able to withstand fist to fist with his stepbrother Hercules, and give him a run for his money, but considering in demigod form Hercules beats him and in full god form he beats him after a more tough fight, we can assume he was fighting with really no mercy, cause Zeus wasn't no more the ruler of the Olympus and cannot kill or stole from Ares his power as a punishment.He was able to teleport, fire lightnings, energy blasts, fireballs, and was skilled in the use of any weapon he pick up.
But Xena beats him on several occasions, but he was fallen in love with her, so we can assume he doesn't always use the 100% of his skills.
Hercules
Only a demigod, but sufficiently strong to being a threat to a god in a physical confrontation, he was also tough and fast, able to perform considerable leaps, and to beat down powerful opponents, like Mars, or the Apocalypse Horseman War, and to withstand against the assaults of his father Zeus for a while.
From the strenght feats of the TV Series, we can put Hercules on Class 15 Tons of Strenght or at max 20, Mars on Class 17/18, Zeus over Class 20 and Hera too.Xena was also superhumanly strong, maybe half of Hercules strenght or around that.
When she fought with the last survived Gods of the Olympus, they were ALL WEAKENED, cause the death of Zeus was the Ragnarok of the Olympians, also Xena was able to kill them cause her daughter gives her the ability of kill Gods.When she beat down Odin, that was a crap fight.It's impossible that Xena even with his physical gifts and combat experience can beat down someone who's the counterpart of Zeus.
Anyway back in topic, the gods of the Marvel Universe operates on more powerful scale than those of the TV Series Hercules and Xena.
In the case of Thor:
He doesn't possess a special weakness
Under a Yellow Sun or a Red Sun he's still the Thunder God
Batman isn't worth of lifting Mjolnir, he's nearly a sociopath